Tag Archives: hk megapirate aio

HK Pilot32 – The Pixhawk "clone" arrived

Last week HobbyKing released the HK Pilot32, a controller for Copters, Planes and Rovers, based on the open source project PX4. I mentioned in my last post that I ordered one for me.

Update 21.04.2015: This one looks the same package as the one from HobbyKing, but the price is much better.

And today I received my package from HobbyKing, only 6 days after I made the order 🙂 The shipping time with DHL Express to Germany was just amazing!

Here are some photos from the HK Pilot32 and my first impressions with this flight controller:

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On the label you can see that the hardware version is as the Pixhawk from 3DRobotics – PX4 2.4.3.

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Overall the quality of the case is good and it doesn’t look cheep. Screws are on top of the case, which is not a bad idea. I miss that there are no holes in the bottom of the case, so I could mount it with screws on my SG Adventure carbon frame. Now I must use the mounting foam.

There are the HKPilot Mega 10s Power Module, Buzzer, Safety switch button, I2C Splitter module, 4GB SD Card (in the HK Pilot32), SD Card reader, Micro USB cable and other tiny cables as well.

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I wanted to see the quality of the production, so opened the plastic case by unscrewing the bolts. The solder connections look fine. I don’t know why, but some of the chip labels were slightly erased. Hope these are new, and not used before.

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And here one last photo of the case itself. There is some foam on the down size. This is were the barometer on the board is, so you don’t need to do this yourself, as for the Crius or APM board.

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Then I connected the board to my computer and the drivers were automatically installed on Windows 7.

Opened Mission Planner, connected the PX4 and there came a message, that a new firmware for the board is available. The HK Pilot32 came preloaded with the open source ArduCopter 3.1.3. The latest stable (not beta) version is at the moment ArduCopter 3.1.5. Downloaded and installed it without a problem, just as on the “original” Pixhawk.

So far everything is fine. Later I will test it on my carbon quadcopter and post how it works. Overall I am very happy going to the next 32bit level 🙂

Update 12.08.2014: Yesterday I replaced my  HK MegaPirate AIO board and FrSky D8R-II Plus receiver with the newly arrived HK Pilot32 and the smaller FrSky D4R-II receiver (It was flashed with the new 27ms CPPM firmware exact as I did it with the D8R-II Plus).

HK MegaPirate AIO = 15 grams; FrSky D8R-II Plus = 13 grams. HK Pilot32 = 33 grams with case; FrSky D4R-II = 5 grams. Overall 10g more of weight.

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Connected the motors as shown on the 3DRobotics site and calibrated the ESCs. I also did some small adjustments on my GPS-cable to fit in the HK Pilot32. Calibrating the flight controller and configuring the settings in the Mission Planner was an easy job. What took me a bit more time is to realize, that the new 32bit controller can not be used without the safety switch (Update: Here is how to disable it). With the actual 3.1.5 firmware of ArduCopter if you don’t connect the safety switch, you can arm it, but the motors don’t spin. So Google helped me finding that fact out. Connected the safety switch, hold it for about 3 seconds (until solid red) and then armed the copter. I tested it a bit at home and it was perfect, but the real tests outside are coming 🙂 So here two more photos of my carbon quad before and after.

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Voltage Sensor on HK Megapirate Multiwii AIO board

On my old KK2.0 board there was an integrated voltage meter. On the new KK 2.1.5 board there is even a header for the voltage detection. But on my new HK Megapirate Multiwii AIO there is no voltage sensor integrated at all. It is very important to know the voltage of the battery pack, so I decided not to buy a voltage sensor, but instead to build my own. I used a simple electric circuit of two resistors, a voltage divider. Very useful for me was this page: http://www.multi-rotor.co.uk/index.php?topic=3144.0

So I used this two resistors R1=110 kohm and R2=47 kohm (You can use resistors with other values, important is the ratio R1/R2). I also find this webpage very useful. After about 10 minutes and some soldering my voltage divider was ready. I connected it to the analog Pin0 on my Megapirate AIO and enabled the voltage sensor in Mission Planner. Then I needed to calibrate the voltage sensor. I used this very good manual on the ArduCopter official webpage. That’s it. Now I can check the voltage of my battery during flight using the Droid Planner 2 app on my smartphone.

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